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3D at Siggraph 2010 3D and Interactivity at Siggraph 2010 Michael Starks © 3DTV Corp 2010 Permission is granted to reprint provided credit is given and nothing is changed, added or omitted. Every summer the ACM special interest group in computer graphics holds its annual USA (there are others in Asia and Europe) conference and exhibition. It’s a wonderful high-tech circus ranging from advanced technical papers to playful interactive art. In the evenings the winners of the juried animations are projected, and of course many are now in 3D. Both the conferences and most of the animations are available in books and DVD’s so I will only cover stereoscopic related offerings in the exhibition halls, with a sampling of student projects, interactive art, and some poster papers. The Canon Mixed Reality Viewer with Polhemus tracker in the center and Virtual Photocopier simulation(screen at left) which imposes the stereo CGI on the real machine for interactive training. This type of see-through HMD projects the CGI on the real object with precise alignment due to realtime object detection via twin cameras and a gyro in the HMD. This system thus has more rapid response and better registration than previously available. www.canon-its.co.jp which, is opaque if you don’t read Japanese, but you can email [email protected] or [email protected] and watch http://www.youtube.com/watch?v=o2NIX7DNpvk (skip the political short at the beginning). The VH-2007 is a prototype running on a dual XeonX5570 with an Nvidia Quadro 4800. Another app for the Canon Mixed Reality HMD --animating a dinosaur skeleton (center) in realtime. In this case museum goers see the dino skeleton and then interact with a stereoscopic CGI simulation. http://www.youtube.com/watch?v=i2RqDTYYoFc , http://www.youtube.com/watch?v=xwIzRIasXto The Canon Mixed Reality system and Dual Polhemus FastTrak trackers controlling the virtual Shuriken blades being used to play Hyak-Ki Men –the Anti-Ogre Ninja’s Mask – a videogame created by a team at Prof. Ohshima’s lab at Ritsumeikan University in Kyoto [email protected] Philipp Bell of WorldViz-- Santa Barbara, California www.worldviz.com-- showed their VR worldbuilding software with a $25K NVision HMD and 3D joystick. http://www.youtube.com/watch?v=MIppOTeHEBc http://www.youtube.com/watch?v=TnlGUl_P6Y4 Nemer Velasquez of CyberGlove Systems www.cyberglovesystems.com with their Highly sophisticated glove and a stereo HMD. http://www.youtube.com/watch?v=WDad5_dnRFg&feature=related One of the demos had a new twist on the structured light approach to depth mapping via the dlp projector and cameras which analyzed the deformations of the straight lines. CEO and Professor at Chonbuk University Ha Dong Kim (left) and Gyu Tae Hwang of CG Wave of Seoul Korea http://cgwave.mir9.co.kr/index_en.html with their Augmented Reality system combining stereo CGI with 2D (soon 3D) video windows. Realtime UGC (User Generated Content) in a stereoscopic VR environment. You can download a trial version of the Wave 3D VR authoring system at http://cgwave.dothome.co.kr/renew/download.htm Jan Kjallstrom (left) and Mats Johansson of Eon Reality www.eonreality.com with CGI on a DLP projector viewed with XpanD DLP Link glasses. The glasses performed very well (i.e., up to 20M away) in this context but not so well in others (see “The Ten Sins of DLP Link Glasses” in the FAQ on my page www.3dtv.jp). An Eon user in Beijing did the 8 view interactive graphics for the NewSight multiview panels, which were promoted by 3DTV Corp in Asia for several years. Eon develops interactive 3D visual content management solutions as well as its renderers and other CGI apps. Simon Inwood of Autodesk Canada showed their software in 3D on a Mitsubishi 3D Ready DLP TV with shutter glasses, running realtime interactive, with a virtual videocamera (i.e., you could put the tracker on your finger just as well) using the well known Intersense tracker http://www.intersense.com/. The irrepressible Ramesh Raskar of the MIT Medialab had his finger in many pies here including the Slow Displays (see below) and several papers. One of special interest to autostereo fans is “Content Adaptive Parallax Barriers for Automultiscopic 3D Display” which explains how to dynamically alter both the front and back panels of such displays to get optimal refresh rate and brightness and resolution for the given content. In his paper with lead author Daniel Lanman and three others he says “We prove that any 4D lightfield created by dual-stacked LCD’s is the tensor product of two 2D mask functions. Thus a pair of 2D masks only achieves a rank-1 approximation of a 4D light field. We demonstrate higher rank approximations using temporal multiplexing. … here a high speed LCD sequentially displays a series of translated barriers. If the completed mask set is displayed faster than the flicker fusion threshold, no spatial resolution loss will be perceived….Unlike conventional barriers, we allow a flexible field of view tuned to one or more viewers by specifying elements of the weight matrix W. General 4D light fields are handled by reordering them as 2D matrices, whereas 2D masks are reordered as vectors.” So this just might be a big step forward for autostereo. You can buy the paper online or even the video http://siggraphencore.myshopify.com/products/2010-tl042 . Below is a Siggraph handout with some projects at MIT. Chris Ward of Lightspeed Design with the small version of the DepthQ Modulator-now a serious competitor for the realD XL system. See www.depthq.com or my ‘3D at Infocomm’ for more info. It is made by http://www.lctecdisplays.com/ Glowing Pathfinder Bugs by Anthony Rowe (Oslo School of Architecture and Design/Squidsoup) http://www.youtube.com/watch?v=DBU65ilhcWM was commissioned by Folly http://www.folly.co.uk/ and made by Squidsoup http://www.squidsoup.org/blog/ for PortablePixelPlayground http://www.portablepixelplayground.org. Projected images of depth-sensitive virtual animals seek the bottom of a sandbox. This is a demonstration of a rapidly growing field called “Appropriated Interaction Surfaces” where images are projected on the hands, floor, sidewalk, car windows etc. Another such AIS demo here was the Smart Laser Projector by Alvaro Cassinelli and colleagues which combines a Lidar beam with a projection beam for Augmented Reality. http://www.youtube.com/watch?v=B6kzu5GFhfg . It does not require calibration and can detect (and so interact with) objects such as fingers above the surface. A second demo was a two axis MEMS mirror which can perform edge enhancement, polarization or fluorescence of printed matter with perfect registration in realtime. Putative apps include dermatology (cancer cell detection and smart phototherapy), nondestructive testing and object authentication. http://www.k2.t.u- tokyo.ac.jp/perception/SLP. You can find a nice article including some very different approaches in the June 2010 issue of IEEE Computer for $19 or free abstract here http://www.computer.org/portal/web/search/simple. The Smart Laser Projector http://www.youtube.com/watch?v=JWqgBRMkmPg enhances and transforms text, images, surfaces or objects in realtime. They have also been used to track, scan and irradiate live protozoa and sperm. Potential apps are limited only by the imagination—e.g., why not have a tactile or auditory output for the vision impaired? For a related device from the same lab see e.g., this YouTube video http://www.youtube.com/user/IshikawaLab#p/u/6/Ow_RISC2S0A. In the Line of Sight by Daniel Sauter and Fabian Winkler http://www.youtube.com/watch?v=uT8yDiB1of8 uses 100 computer-controlled flashlights to project low-resolution video on the wall of human motion in a 10 by 10 matrix representation of video (the video is shown on an adjacent monitor). For more photos and info on exhibits in the Touchpoint interactive art gallery see http://www.siggraph.org/s2010/for_attendees/art_gallery Lauren McCarthy of UCLA in this photo from her page http://lauren-mccarthy.com/projects.html wearing her Happiness Hat http://www.youtube.com/watch?v=y_umsd5FP5Y . Her exhibit “’Tools for Improved Social Interacting’ is a set of three wearable devices that use sensors and feedback to condition the behavior of the wearer to better adapt to accepted social behaviors. The Happiness Hat trains the wearer to smile more. An enclosed bend sensor attaches to the cheek and measures smile size, affecting an attached servo with metal spike. The smaller the smile of the wearer, the further a spike is driven into the back of their neck. The Body Contact Training Suit requires the wearer to maintain frequent body contact with another person in order to hear normally; if he or she stops touching someone for too long, static noise begins to play through headphones sewn into the hood. A capacitance sensing circuit measures skin-to-skin body contact via a metal bracelet sewn into the sleeve. The Anti-Daydreaming Device is a scarf with a heat radiation sensor that detects if the wearer is engaged in conversation with another person. During conversation, the scarf vibrates periodically to remind the wearer to stop daydreaming and pay attention.” Yan Jin of 3DTV Corp petting the irresistible ADB (After Deep Blue—a reference to IBM’s famous world champion chess computer), is a touch responsive toy that pets you back-- by Nicholas Stedman and Kerry Segal http://www.youtube.com/watch?v=pcEGh03ADyI . It also defends itself when hurt. “ADB is composed of a series of identical modules that are connected by mechanical joints.
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